Jack post structure



9 s. E. EVANS 1,970,741 I JACK POST STRUCTURE Filed March 1:5, 1950,

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Patented Aug. 21, 1934 1,970,741 JACK ros'r STRUCTURE Silas E. Evans, Bristow, olrla assignor to Standard Oil Development Company, a corporation of Delaware Application March 13, 1930, Serial No. 435,441

IClaim.

This invention relates to improvements in foundations for rigs used in drilling and pumping wells and is more particularly directed to improvements in jack post structure; The invention will be fully understood from the following 'description taken in connection with the accomfpanyin drawing in which Fig. 1 is a side elevation of the improved con- ..struction;

Fig. 2 is a top plan view thereof; Fig. 3 'is' a detail view in side elevation of the upper portion of the jack post; and

Fig. 4 is a similar detail in front elevation. In the drawing, the base of the jack post is 1 shown as formed of a frame comprising two elongated pipe sections land 2 having beveled ends which-are connected by two pipe sections 3 and 4. The connections are made by welding the pipe sections together or by. any other type 'of permanent connection such as brazing. A tubular upright 5 extends from each pipe sec-,- tion 1 and 2 intermediate their ends. The uprights are secured to the pipe sections by welding or by other suitable form of permanentconneclar brackets 6 and '7 which extend from opposite sides of the upper portion of each upright to pipev sections 1 and 2. A bearing housing section 9 is permanently secured as by welding to each tighten the connection. The bearing housings contain suitable bearings 16 and a shaft 1'1 is rotatably disposed in the bearings. Concrete is constitutes a reservoir for lubricant in the upper with the bearing housings adjacent their ends and communicate with the reservoir to'drain lubricant from the housings. Oiling chains 19 are associated with the bearings and depend into the reservoirs. The jack post structure is anchored to blocks of concrete 21, 22 and 23] by means of anchor bolts 24 which project downwardly from the base.

' In the preferred embodiment, the base is constructed of 8% inch pipe which is cut and welded to form a frame approximately feet long by approximately 5 feet wide. The tubular uprights are welded to approximately the middle 2 of the base. Turnbuckles 14 are providedfto' disposed in the uprights leaving a space which of the frame and are braced by 4 inch pipe braces which are approximately 6 feet :1 inches long and extend from near the upper portion of the tubular upright to the base at an angle of approximately degrees.

bearinghousing are approximately 6 inches in diameter and are securely welded to the ends of the uprights.

The jack post construction described is unitary out of nd its parts cannot become loosened and lignment during use.

In assembling the claim, in which it is my intention to claim all novelty inherent in the invention as broadly as the prior art permits.

I claim:

In a jack post structure comprising an elongated base formed of a frame having side pieces of tubing and end pieces of tubing extending be tween and permanently secured to the side pieces,

the improvement which c omprises a pair of upstanding tubular posts directly and permanently secured to the side pieces at an intermediate point thereon, a pair of tubular braces, secured to each post, extending laterally and downwardly from opposite sides thereof to a permanent connection with the side pieces at points intermediate the posts'and the and a stiffening filler of a ends of the side pieces, solidified plastic matelationship to the tops of the posts to form integral lubricant reservoirs therein for supplying lubricant to bearings to be sup portion of the uprights. Pipes 18 communicate ported by the posts.

SILAS E. EVANS.

The lower halves of the 

